RTCA Paper No. 219-07/SC186-252 August 20, 2007 Summary of ...

Summary of the Forty-First Meeting
SC-186
RTCA Paper No. 219-07/SC186-252
August 20, 2007
AUTOMATIC DEPENDENT SURVEILLANCE - BROADCAST (ADS-B)
DATE: August 3, 2007
PLACE: RTCA, 1828 L Street, NW, Suite 805, Washington, D.C. 20036
The attendees included:
Co-Chairman SC-186
Vincent Capezzuto Federal Aviation Administration
Rocky Stone United Airlines
Secretary SC-186
Jonathan Hammer MITRE / CAASD
Members (Present)
Larry Bachman The Johns Hopkins University
James Baird Federal Aviation Administration
Randy Bone MITRE / CAASD
Chip Bulger Federal Aviation Administration
Bob Burns Engility Corporation
Barbara Clark Federal Aviation Administration
Robert Clarke Alion Science and Technology
Ann Drumm MIT Lincoln Laboratory
Jim Duke ALPA
Tom Eich ACSS – L3 Communications
Edward Falkov State Research Institute of Aviation Systems
Mark Fuhrmann SAIC
Gary Furr Engility Corporation
Robert Grove Garmin Ltd.
Richard Jennings Federal Aviation Administration
John Kefaliotis ITT Corporation
George Ligler PMEI
Gary Livack Federal Aviation Administration
Roberta Massiah Aurora Sciences LLC

Peter Moertl MITRE / CAASD
Harold Moses RTCA, Inc.
Thomas Mulkerin Mulkerin Associates, Inc.
Thomas Pagano Federal Aviation Administration
Michael Petri Federal Aviation Administration
William Petruzel Federal Aviation Administration
Steve Ramdeen Federal Aviation Administration
Sethu Rathinam Rockwell Collins, Inc.
Mark Reed ALPA
Rick Ridenour ACSS
William Russell, III Russell Systems
Taji Shafaat The Boeing Company
Bernald Smith Soaring Society of America
Harold Summers Helicopter Association International
Tom Teetor Defense Concept Associates, Inc.
Dave Thomas Federal Aviation Administration
Don Walker Honeywell International, Inc.
Jim Walton UPS Advanced Flight Systems
****************************************************************
In accordance with the Federal Advisory Committee Act, Richard Jennings,
Federal Aviation Administration (FAA), was the designated Federal
Representative for this meeting.
****************************************************************
Agenda for the Meeting:
1. Chairman's Introductory Remarks.
2. Review of Meeting Agenda.
3. Review/Approval of the Fortieth Meeting Summary,
RTCA Paper No. 159-07/SC186-250.
4. Date, Place and Time of Next Meeting.
5. Review proposed TORs for SC-186 and WG-1
6. Working Group Reports
• WG-1 – Operations and Implementation
• WG-2 – TIS-B MASPS
• WG-3 – 1090 MHz MOPS
• WG-4 – Application Technical Requirements
• WG-5 – UAT MOPS
• RFG
7. Final Review/Approval – Proposed Final Draft – revised DO-286A – Minimum
Aviation System Performance Standards (MASPS) for Traffic Informantion Service –
Broadcast (TIS-B), RTCA paper No. 158-07/SC186-249
8. New Business
9. Other Business
2

10. Review Action Items/Work Program
11. Adjourn
1. Review of Meeting Agenda.
Two agenda items were added:
• Report from the RFG
• Discussion of how to best proceed to make changes to the DO-260A, DO-282A
message set and how to best proceed with future changes to the standards.
2. Review/Approval of the Fortieth Meeting Summary, RTCA Paper No. 159-
07/SC186-250.
The minutes were accepted with one change to correct Rich Jennings’ comment on the
need for common symbol sets for CDTI.
3. Date, Place and Time of Next Meetings
Late 2008 (August) Australia meeting: we took a poll to arrive at an expected
approximate head count and determined it would be 30 – 40 … Vinny took an action to
continue to work with Greg Dunstone to finalize the exact date in August.
Note: Dr. Falkov explained some developments in Russia and the Nordic states: VDL
M4 will be implemented in Russia and the Nordic states and there is a plan there to
mandate ADS-B.
A summary of planned meetings is contained in the following table:
Group Dates Location Comments
ASSAP & CDTI October 2 – 4, 2007 RTCA, Washington,
MOPS
D.C.
SC-186 Plenary October 5, 2007 RTCA, Washington, Status check /
D.C.
plan for ending
early PM
ADS-B RFG October 15 – 19, CENA, Toulouse,
2007
France
ASSAP & CDTI December 4 – 7 Phoenix, AZ (pending
MOPS
confirmation)
ASSAP & CDTI January 15 – 17, Rockwell-Collins,
MOPS
2008
Melbourne, Fla.
3

Group Dates Location Comments
SC-186 Plenary January 18, 2008 Rockwell-Collins,
Melbourne, Fla.
4
Status check /
plan for ending
early PM
ADS-B RFG January 21 – 25, Rockwell-Collins,
2008
Melbourne, Fla.
ASSAP & CDTI March 4 – 7 RTCA, Washington,
DC
ASSAP & CDTI April 21 – 23, 2008 RTCA, Washington,
MOPS
D.C.
SC-186 Plenary April 24, 25, 2008 RTCA, Washington, Expected
D.C.
document
approval. Plan
to end on the
24 th but hold 25 th
AM in reserve if
needed.
SC-186 Plenary August 2008 TBD, Australia Will be
coordinated
4. Review proposed TORs for SC186 and WG1.
Proposed revised terms of reference for SC186 and WG1 were presented to the
committee. The revisions were agreed to with two editorial changes:
• Need to change WG to SC186 in last sentence of the 186 TORs.
• Update TIS-B MASPS dates in 186 tors
With these changes, both TORs were approved by the plenary. The plenary agreed to
present the SC186 TORs to the RTCA Program Management Committee for
consideration.
There was a discusison as to whether the other working groups in SC186 should have
terms of reference. It was agreed that they should. As such, the plenary requested an
action for all WG chairs to bring back a proposed terms of reference to the next plenary.
5. Discussion of upcoming changes to standards and message set.
It was agreed to open a discussion of finding a more timely path to make changes to our
standards and specifically to the message set as needed.
George Ligler recommended that the plenary establish an ad-hoc group to work out a
multi-year approach to accomplish this objective and avoid having standards lag 3 or 4
years behind where they ought to.

The plenary agreed to establish this ad-hoc group. It was agreed that the group will work
on applying the structure that is already in place with regard to our document waterfall
(i.e., ASA MASPS followed by ADS-B MASPS then link and ASSAP/CDTI MOPS).
The group is actioned to come up with a specific plan to work on the details of how we
will proceed.
The group will propose a plan of how to apply our process and accelerate as much as
possible the implementation of new air-to-air applications.
The plenary agreed to the following membership for this ad-hoc group:
• George Ligler (lead)
• Stu Searight
• Rich Jennings
• Jim Walton / Bob Hilb (alternates for UPS)
• Tom Pagano
• Rocky Stone
• Randy Bone
• Boeing representative (TBD possibly John Brown or Tony Warren)
The ad-hoc group will also make recommendations as to “trigger points” for revisions to
ASA MASPS and the subsequent document water fall.
The group will issue a status report to the plenary in October and will issue a final report
to the plenary in January.
6. SBS Program Status Briefing – Vinny Capezzuto
Vinny gave a status update on the SBS program. Highlights:
• NPRM due out 9/2007.
• Will be moving towards the next phase shortly, as we begin ground infrastructure
deployment.
• 2013 complete date for ground infrastructure to be deployed.
• Vinny emphasized that the ASSAP/CDTI approval is key to the program.
• PHL IOC 2/2010 conflict detection (surface).
• Need to talk about the WG1 OSED for Surface Conflict Detection for June
2009… need to make sure that we have an integrated schedule that coordinates
program office needs with this IOC date.
Vinny raised a concern about the schedule coordination and making sure that WG chairs
are working with the program office.
7. Working Group Reports
5

• WG-1 – Operations and Implementation (Randy Bone)
Randy reported on progress for the surface alerting application. Jim Duke was
nominated and approved by the plenary to co-chair the ATSA-SURF subgroup. The
current plan is to have the OSED, SPR, and Interop in approximatey 1 and ½ years. It
was agreed that a controller needs to be part of the core team for the OSED. A draft
application description is planned to be presented to the plenary in January.
• WG-2 – TIS-B MASPS (Ken Staub) and Final Review/Approval - Proposed
Final Draft – revised DO-286A – Minimum Aviation System Performance
Standards (MASPS) for Traffic Information Service – Broadcast (TIS-B), RTCA
Paper No. 158-07/SC-186-249.
DO-286A: all responses were concur with comment. All comments were adjudicated
with concurrence from the comment authors. ADS-R: Ken recommended that an RTCA
publication is not needed as ADS-R is well addressed by program office requirements.
Ken’s two recommendations were approved by the plenary: (1) The TIS-B revision
cited above was approved to be sent to the RTCA PMC as DO-286B. (2) The ADS-R
material will not be published. The ADS-R material will be archived by RTCA.
• WG-3 – 1090 MHz MOPS (Tom Pagano)
Gary Furr showed a web site that he has constructed for the plenary and asked for plenary
approval to put committee archival files on the site. The plenary agreed to have Gary
populate the site.
• WG-4/B ASAS MOPS (Don Walker, Sethu Rathinam)
Don presented WG4 progress. An issue of concern for which plenary consideration was
requested was the CD application. The working group is concerned that the specific
thresholds in the CD requirements in the ASA MASPS are not sufficiently mature to
make into requirements. The working group discussed options this week, there were
three. Don presented to the plenary the three options with the request that the plenary
endorse one of the three; the WG recommendation was for the third option.
1. Drop the CD application
2. Do the required homework to validate the CD thresholds – estimated to be about a
9 month effort
3. Make algorithm performance a requirement based on example scenarios, make
thresholds recommendations in appendices rather than requirements, and let
vendors develop the final design and compete
After some discussion, the plenary endorsed option 3.
6

Sethu reported that the CDTI group has moved to document drafting … 80% of draft
material is complete and they are in the process of detailed review. Writing should be
done within the next 6 – 8 weeks. The group is holding teleconferenes every 2 weeks …
Sethu felt that the schedule risk for meeting the April target is relatively small.
• WG-5 – UAT MOPS
George Ligler reported that the UAT SARPS will be in an ICAO amendment that takes
effect in November of this year.
• RFG (Roberta Messiah, Jim Baird)
Roberta reported on the VSA and ITP applications.
VSA: The RFG has agreed to an approach to use of flight ID and has agreed to a
performance spec based on a comparison with what pilots are doing today.
The status of VSA is considered yellow because of discussion of two versions of the app:
basic vs. advanced.
ITP: The OSED is mature and will be moved forward into SPR. The OPA scope has
been agreed.
Jim Baird reported on the RAD application: the comments on the OSED have been
resolved; the OSA and OPA have begun in parallel.
George Ligler presented a paper on 4096 code and asked for plenary agreement that we
remove the geographic filter in DO-260A so that the 4096 code is broadcast outside the
United States. The plenary agreed to have WG3 go work on a change DO-260A to take
care of this. WG3 will work towards a January approval.
8. New Business.
No new business.
7

9. Review Actions Items/Work Program
Action: Vinny to continue to work with Greg Dunstone to finalize exact date of an
August 2008 plenary.
Action: WG chairs bring back a proposed terms of reference to the next plenary.
10. Adjourn
-S-
Jonathan Hammer
Secretary, SC-186
CERTIFIED as a true and
accurate summary of the meeting.
-S- -S-
Vincent Capezutto Rocky Stone
Co-Chair, SC-186 Co-Chair, SC-186
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